Nut-lock.



No. 717,382. l Patented Dec. 30, |902.

Z. FREI. I

NUT LUCK.

(Appliction filed Sept. 13, 1902,)

(No Model.)

UNITED STATES PATENT NEnron.

ZLESTIN FREI, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO CHARLES A. MORENO AND WILLIAM FINN, OF ST'. LOUIS, MISSOURI.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 717,382, dated December 30, 1902.. i

Application filed September 13l 1902. Serial No. 123,312. (No model.)

T0 all whom/:in may concer-71,:

Be it known that' I, ZLESTIN FREI, a citizen of the United States, residing at the city of St. Louis, State of Missouri, have invented a certain new and useful Improvement in Nut-Locks, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a side view of my invention. Fig. 2 is a side View with the end on which is secured the nut shown in section. Fig. 3 is an end view showing the nut and pin in position, and Fig. 4L is a sectionalview'of the nut end of the bolt with the parts interlocked.

This invention relates to a certain new and useful improvement in nut-locks, the object being to provide a simple and economical means for locking a nut on the end of a bolt by insertible means which may be placed in position when the nut is at any one of a num ber of predetermined positions; and the invention consists in certain features of novelty in the construction and arrangement of the parts, all as hereinafter more fully specified, and particularly pointed out in the claims.

Referring to the drawings, A is the shank of a bolt; B, its head; O,the screw-thread on its end, and D a channel cut in the shank at the threaded end, the bottom of which chan` nel extends in substantially a straight lineA for some distance,` after whichsaid channel becomes gradually of less depth, and Iinally ceases 4within the screw-threaded portion of said bolt, the inner end thereof rising to the surface of the bolt in a gradual incline for the purpose hereinafter set forth. The side walls of said channel are substantially parallel and at right angles to the bottom thereof.

With the bolt, which may be of any convenient or desired form in all but the channel D, is a nut E, which is provided with the usual central screw-threaded orifice E', from which extends a number of radial slots or half-channels E2, preferably four, ,which are arranged at substantially diametrically opposite points. These radial slots are provided with substantially parallel side-Walls and a Iiattened bottom, though thelatter may be curved in cross-section, if desired. Coperating with said bolt and nut is a pin F, provided with a head F', the edge Fzof which,

`adapted to contact with said nut, beingI substantially at right angles with the central axis of its shank, so as to fit snugly when in posi-` the slots E2 registering with the channel D,

the pin F is inserted and driven into position, during which the shank thereof will impinge the bottom of said channel and, following the lines thereof, be deflected from a straight line, whereby it will assume the curve shown in Fig. 2, in which a portion of said pin lies back of the nut, the head of said pin resting next thereto and the shank in the coincident chan nels therefor in nut, and bolt will be securely locked in position.

When my device is used in connection with materials of a yielding nature, it will be seen that when in its home osition the inner end of the pin may project beyond the surface of the bolt and be embedded in such material, thus assisting not only in securing the nut in position, but also preventing rotation of the bolt on its own axis in the event of torsional strain thereon. v

The head B ofthe bolt may be provided with any suitable or desirable auxiliary securing means, such as a hook or ring, but

as the invention is not limited to such combination it is shown as a plain head.

When desired, the head of the pin'may be provided with an eye to aid in withdrawing the same, or it may be withdrawn by any convenient means, whereupon the" nut may be,

rotated to tight-en the same or for removal.

I am aware that minor changes in the construction and arrangement of the several parts of my nut-lock may be made and substitnted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described myinvention, what I claim, and desire to secure by Letters Patent, is-

l. A locking means for nuts, &c., comprising a screw-threaded bolt with a channeled shank, said channel being deepest at the end of said bolt and extending therein at a uniform depth for a predetermined distance,from whence it becomes gradually less deep to a point Where it disappears Within the screwthreaded portion of said shank, in combination With a key having an oset head portion anda shank portion of sufficient length to eX- tend within said channel sufficiently far to be deiiected from a straight line by the tapering bottom portion thereof; substantially as described.

2. A locking device of the described class comprising ascrew-threaded bolt with achannel therein provided with a bottom portion of substantially uniform depth to a predetermined point from Whenceit rises to the outer line of the shank of said bolt, in combination with a nut provided with a central screwthreaded orifice, and radial slots extending therefrom, and a locking-pin with an oiset head, parallel sides, parallel edges for a portion of its length, and tapering edges for the remainder of its length to the end opposite the head, said pin being of sufficient length 4. In a nut-lock, a nut with a series of radial channel portions extending from a oentral screw-threaded orifice, a bolt with longitudinal channel cut therein substantially deepest at its end away from the head, and disappearing at a point removed from said head, in combination With atapering pin insertible in said channels Where they are in coincidence and of sufficient length to be bent by said bolt-channel at the point of its lesser depth; substantially as described.

In testimony whereof I hereunto afx my signature, in the presence of tWo witnesses, this 9th day of September, 1902.

ZLEsTIN FREI.

Witnesses:

GEORGE BAKEWELL, G. A. PENNINGTON. 

